Bearing for car-trucks.



PATENTED JUNE 16. 1908.-

0. P. TRANSUE.

BEARING FOR GAR TRUCKS.

APPLICATION FILED JAN. 3, 1905.

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TTa/M/EK UNITED STATES PATENT OFFIQE.

OLIVER F. TRANSUE, OF ALLIANCE, OHIO.

BEARING FOR GAR-TRUCKS.

Specification of Letters Patent.

Patented June 16, 1908.

Application filed January 53, 1905. Serial No. 239,506.

' bearing for a car on its truck so that there section; Fig. 2, a plan view of will-be little or no'resistance to the slight rotation of the truck rendered necessary for rounding curves and taking sidings and the object of the improvement is to provide a simple, strong and'e'flicient bearing which will not have its surfaces cutor ground by its operation. This object is attained by the construction and arrangement illustrated with reference to a center bearingin the accompanying drawing, in which Figure 1, is a cross-section of a car showing the truck in elevation with, the bolsters broken away to show the center bearing in' art of the lower center plate showing the ro lers. therein; Fig. 3, a fragmentary section of the plates, as on line 33, Fig. 2, the end of one roller; the plates and rollers, as on line 44, Fig. 2.

and showing throughout the drawing.

The upper and lower plates 1 and 1. are.

ward in the upper plate, so asto form fullv bearings 8 on the sides of the truncated-coneshap ed rollers 9, one of whichrollers is radially located in each pair of opposing recesses. v

The outer ends 10 of the rollers are preferably rounded, as t-he surface of the segment of a sphere having the intersection 11 of the axes of the center-pin and the rollers as a center, and the inner faces 12 of the exterior flanges are preferably formed vertical, or as near vertical as is convenient for casting or forging, so that they will be substantially cylindrical, and the contact of the outer'end of each roll is theoretically limited to the and Fig 4, a section of Similar numerals refer to similar parts" horizontal line traversing the center v13 thereof, or practically to the lines of the abu tting parts of the inner edges 14 of the exterior flanges, as indicated by dotted lines on the end of the roller in Fig. 3. Although this contact is very slight in the vertical direction it is extended to the full width of the rollers horizontally, and therefore tends to hold the roller in its pro er radial position.

It will be noted that tlie frictional resistance arising from the outer end contact of the rollers, tending to retard their rotation, does not act horizontally to retard the lateral travel of these ends of the roller, but, excepting only at the points opposite the center 13 of the ends of the rollers, this resistance acts vertically, or substantially'so, and in reverse directions, on the opposite sides of the centers. Furthermore such tendency as there may be to retard the lateral travel of the outer ends of the rollers arising from the friction of the contact of the ends of the rollers with the edges of the flange ofone plate,

-is neutralized by the friction of the flange of the other plate, because the plates rotate. in

opposite directions when the bearing is brought into play. But it will be understood that the friction of the ends of the rollers against the exterior flanges is never very great because its amount de ends on the centrifugal endwise thrust of t e rollers, which thrust irrturn cannot be made without anendwise sliding/0f the rollers on there'spective. plates. The bearings: proper 8 of the plates on the rollersare along the upper and lower faces 15 of the rollers and throughout the entire length thereof, and while theoretically this bearing contact is-merely along a line, -yet practically it is on a face of some little width, so "that the considerable bearing surface thus presented to the plates prevents, to a great extent, the rollers from sliding endwise.

Theparts are so proportioned and arranged that the projection of the cones of which the rollers are truncated parts would bring their apexes to the intersection 11 of the axes of the centerpin and the rollers, so that there is no'sliding or rubbing at any point in the bearing proper of the rollers on the plates, and consequently there is no cutting or grinding of the bearing surfaces. Such cutting r grinding as'there may be from the contact of the ends of the rollers with the edges of the exterior flanges does not affect the bearing. faces proper, and as middle line of the several bearing recesses 7 when the truck is alined with the car, and the annular width of the recesses is so pro ortioned that the radial partition of one p ate and the opposite partitionof the other plate will abut against the sides of the rollers when the truck is rotated to the maximum extent necessary for the sharpest curve or turnout, as shown by broken lines in Fig. 3, and it is the radial faces of the partitions will act to rectify the relative location and the radial alinement of any of the rollers that may be In. the

diverted or deflected therefrom. same way the rollers are readily brought to their normal position when the parts of the truck are first assembled, and preferably before any considerable load is imposed on the bearing.

and lower plates with opposite recesses therein having partitions with radial faces between and substantially cylindrical annular flanges around the same, and truncatedevident that when the truck is thus rotated, ing recesses and having their outer ends rounded and adapted to bear full width on cone-shaped rollers radially located in opposthe edges only of the flanges, the bottoms of the recesses being inclined endwise to bear f on the sides of the rollers throughout their length and the radial faces of the partitions being arranged to abut the sides of the rollers 1 and to rectify the alinement of the same be formed'deeper in the middle, reference 1 either one or the other plate is provided with the flanges and partitions, the operation of the bearing will be substantially as described when both plates are recessed. And while the invention has been illustrated and described with reference to acenter-bearing, it

is evident that similar devices can be employed in a side bearing.

What'I' claim as my invention, and'desire to secure by Letters Patent, is

1. A car-truck center-bearing comprising a center-pin, upper and lower plates axially mounted thereon, there being opposite re-- cesses in the plates having partitions with radial faces between and substantially cylindrical annular flanges around the same, and truncated-cone-shaped rollers radially located in opposing recesses and having their outer ends rounded and adapted to bear full width on the edges only of the flanges, the

i when the truck is rotated to the maximum The bottoms of the bearing recesses may degree.

3. A car-truck bearing comprising upper and lower plates with opposite recesses therein having partitions with radial faces between the same, shaped rollers radially located in opposing recesses, thebottoms of the recesses being inclined endwise .to bear on the sides of the rollers throughout their length and the ra- 1 dual faces of the partitions being arranged to abut the sides of the rollers and to rectify the alinement of the same when the truck is rotated to the maximum degree.

4. A car-truck bearing comprising upper and lower plates with opposite recesses and truncated-cone therein having substantially cylindrical annular flanges around the same, and trimcated-cone-shaped rollers radially located in opposing recesses and having their outer.

ends rounded and adapted to bear full width on the edges only of the flanges, the bottoms of the recesses being inclined endwise to bear on the sides of the rollers throughout their length.

In testimony whereof I have signed my nameto this specification in the presence of 1 two subscribing witnesses.

OLIVER F. TRANSUE.

Witnesses:

H. 0; GAIN, HARRY FREAsE. 

